Many, many nights in a Slick (non-gunship= "slick" sides). I'll take cold over warm, wet and buggy. When it wasn't raining, I'd try the roof top, and let the guys inside feed the mosquitoes. Really sucked when it rained so hard you had to close up- think steam bath.
A civilian Astar's nice- wide and cushy seats, great for napping. Never had to RON in one. An EMS Astar interior is cramped, with narrow irregular seating. The stretcher's only habitable with massive doses of drugs- which my medics took with them when they left with the patient- Halloween in a hay field, not the night to leave the bird out alone.